Socrates Cafe, a chance for amateur philosophers to discuss everything from aesthetics to ethics in a low-key and friendly atmosphere, is at Natale Coffee, 17th and Main streets, Santa Ana. Moderator Martin Young leads the group, which meets at 7 p.m. Free. (714) 547-2148.

Sherry Maysonave will discuss and sign "Casual Power: How to Power Up Your Nonverbal Communication and Dress Down for Success" at Barnes & Noble in Metro Point, 901 South Coast Drive, Costa Mesa. 7 p.m. (714) 444-0226.

EXHIBITS

"From Orange Groves to Digital Gardens," a multimedia exhibit including music, video, animation, computer graphics, photos, lasers and interactive presentations documenting the history of Cal State Fullerton, is on view through May 31 in the campus Library Atrium Gallery, 800 N. State College Blvd., Fullerton. 8 a.m.-8 p.m. Free. (714) 278-2990.

"Discovering Dinosaurs," an exhibit exploring dinosaurs and fossils, is on view through Jan. 23 at the Children's Museum at La Habra, 301 S. Euclid St. The exhibit features a hands-on excavation pit, fossil exhibits, an art exhibit using dinosaur bones and skin, and a touchable dinosaur leg bone. 10 a.m.-5 p.m. $4. Free for children younger than 2. (562) 905-9793.